Hey!
This could be rewritten as:
2x + 1 + 5x
We can add like terms together:
7x + 1
This solution has 2 solutions is the answer
Obviously the smallest odd number we are looking for will have the SMALLEST four prime factors.
The smallest four prime numbers are 2,3,5,7. The lowest multiple of this is 2*3*5*7 = 210 But this is an even number!
So let's remove 2, and use the next prime number: 3,5,7,11. The lowest multiple of these is 3*5*7*11 = 1155.
2+3*m=18 I think is what that sentence would be as an equation
I belirve the answer is B